Скачать или смотреть How to Synchronize Text Across Multiple Textareas with JavaScript

Discover how to easily make multiple textareas reflect the same content simultaneously using JavaScript and jQuery. Perfect for enhancing user experience!
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This video is based on the question https://stackoverflow.com/q/66772583/ asked by the user 'ixcode' ( https://stackoverflow.com/u/12988479/ ) and on the answer https://stackoverflow.com/a/66772624/ provided by the user 'syduki' ( https://stackoverflow.com/u/13993967/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Synchronize Text Across Multiple Textareas

Do you want to create a seamless experience for your users by enabling them to type in one textarea and have that text automatically appear in others? If you’ve ever struggled with synchronizing content across multiple textareas, you’re in the right place. In this guide, we will tackle how to ensure that all textareas update to show the same text instantly, regardless of which one is edited.

The Problem

Imagine you are developing a web application with three textareas. Users expect that when they type in one textarea, the same text should appear in the others. However, you notice that currently, only one textarea updates based on the changes made. This can be frustrating both for developers and users alike!

Here’s a quick snapshot of the original issue you might encounter:

Three textareas in your application (let's call them textarea 1, textarea 2, and textarea 3).

You type something into textarea 1.

Only textarea 1 reflects the change, leaving textarea 2 and textarea 3 unchanged.

The goal is to make these textareas mirror each other’s content in real-time.

The Solution

To solve this issue, we can leverage JavaScript (with jQuery for simplicity) to listen for input events in any of the textareas. Here’s a step-by-step breakdown of how to accomplish this.

Step 1: Set Up Your HTML

First, create a basic HTML structure for three textareas. Here’s the code you will need:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Write the JavaScript

Next, we need to add a script that will keep all three textareas synchronized. Place the following jQuery code in a <script> tag below your textareas:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the JavaScript Code

Selecting Textareas: document.querySelectorAll('textarea') selects all the textarea elements on your page.

Adding Event Listeners: We iterate through each textarea and attach an input event listener. This allows us to capture any changes the user makes.

Synchronizing Values: Inside the event listener, we loop through each textarea and update its value to match the one that triggered the event, excluding the one currently being modified. This ensures all textareas remain in sync.

Putting It All Together

Once you have both your HTML and JavaScript set up, running your code will enable a synchronized typing experience! No matter where the user types, the text will automatically populate across all textareas.

Conclusion

By following the steps outlined, you've successfully created a solution to synchronize text across multiple textareas. This not only improves user experience but also streamlines data entry tasks within your web applications.

Now, you can ensure that your users enjoy a smooth and efficient text input experience. Happy coding!